News
Research shows clownfish potentially at risk due to environmental changes
The beloved anemone fish popularized by the movies “Finding Nemo” and “Finding Dory” don’t have the genetic capacity to adapt to rapid changes in their environment, according to a study by France’s National Centre for Scientific Research (CNRS), Woods Hole Oceanographic Institution (WHOI) and colleagues. Their findings published Nov. 27, 2019, in the journal Ecology Letters.
An international team of researchers monitored clownfish in the lagoons of Kimbe Bay—a biodiversity hot spot in Papua New Guinea—for more than a decade. Using genetic analysis of the population’s DNA, the researchers were able to calculate their potential to adapt to habitat changes and renew their population. They found that big families of clownfish that extended over many generations were linked to high-quality habitats, rather than to shared genes.
“The findings reported here were made possible by a huge sampling and DNA sequencing effort that had not been attempted for any marine species before,” says WHOI biologist Simon Thorrold, a coauthor of the paper. “The biggest surprise to us was also the most troubling: conservation efforts cannot rely on genetic adaptation to protect clownfish from the effects of climate change. It seems that Nemo won’t be able to save himself.”
The quality of the anemone that provides a home to clownfish contributes significantly—on average 50 percent—to its ability to survive and renew its population. If high-quality anemones remain healthy, the clownfish population will persist. However, if the anemones and coral reefs they call home are impacted by a warming climate, the clownfish are in trouble.
“Nemo is thus at the mercy of a habitat that is degrading more and more every year,” says Benoit Pujol, an evolutionary geneticist at CNRS. “To expect a clownfish to genetically adapt at a pace which would allow it to persist in the lagoons would be unreasonable, and thus the ability of these fish to remain in the lagoons over time will depend on our ability to maintain the quality of its habitat.”
Additional coauthors of the paper include colleagues from James Cook University/Australian Research Council Centre of Excellence for Coral Reef Studies, King Abdullah University of Science and Technology, The Universidad Austral de Chile, and the Université de Perpignan.
This research was supported by: Laboratoire d’Excellence CORAIL; Coral Reef Initiatives for the Pacific; the Global Environment Facility Coral Reef Targeted Research Connectivity Working Group; the U.S. National Science Foundation; the Australian Research Council Centre of Excellence Coral Reef Studies; The Nature Conservancy; Total Foundation; James Cook University; King Abdullah University of Science and Technology; and Woods Hole Oceanographic Institution.
Find out more about WHOI at www.whoi.edu.
News
Dive Worldwide Announces Bite-Back as its Charity of the Year
Over the next 12 months, specialist scuba holiday company Dive Worldwide will be supporting Bite-Back Shark & Marine Conservation with donations collected from client bookings to any one of its stunning dive destinations around the world. The independently-owned operator expects to raise £3000 for the UK charity.
Manager at Dive Worldwide, Phil North, said: “We’re especially excited to work with Bite-Back and support its intelligent, creative and results-driven campaigns to end the UK trade in shark products and prompt a change in attitudes to the ocean’s most maligned inhabitant.”
Bite-Back is running campaigns to hold the media to account on the way it reports shark news along with a brand new nationwide education programme. Last year the charity was credited for spearheading a UK ban on the import and export of shark fins.
Campaign director at Bite-Back, Graham Buckingham, said: “We’re enormously grateful to Dive Worldwide for choosing to support Bite-Back. The company’s commitment to conservation helps set it apart from other tour operators and we’re certain its clients admire and respect that policy. For us, the affiliation is huge and helps us look to the future with confidence we can deliver against key conservation programmes.”
To launch the fundraising initiative, Phil North presented Graham Buckingham with a cheque for £1,000.
Visit Dive Worldwide to discover its diverse range of international scuba adventures and visit Bite-Back to learn more about the charity’s campaigns.
MORE INFORMATION
Call Graham Buckingham on 07810 454 266 or email graham@bite-back.com
Gear News
Scubapro Free Octopus Promotion 2024
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